Hi,

Let x represent the son's present age   

Question States*** Vijay's age Now is (x+23)

After 7 years: Both Vijay and Son are 7 years older

   Vijay in 7yrs = twice(son 7 yrs older)



  x + 30 = 2x + 14

      16 = x, son's age.  Vijay is 39   

CHECKING our answer***After 7 years...

  46 = 2*23

Wish You the Best in your Studies.

 

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